Collaborative editing systems are common in Wikipedia  [1]}, [2]},
GitHub code editing [3]}, webcasts [4]},
scientific contents [5]}, [6]}, and so on. Compared to substantial research on conducting studies on existing collaborative editing systems, we are not aware of much research that focuses on developing tools and techniques to improve the systems. This is perhaps due to the fact that currently available collaborative platforms like Wikipedia seem to work well and are hugely popular. In all these platforms, the focus of collaborative editing is to improve the quality of the shared content based on
user engagement [7]}.
